Ancient-Red-Dragon: … The next-closest thing to an infallible backup method would be to have multiple backups, and stored at multiple different locations. How many GOG users have the resources and also the time/energy/technical knowledge/wherewithal etc. to bother doing all of that for their GOG games? Probably there is only a very few who can/would do that. …
One of the few. (The proud? Wait, that's an advertisement for the US marines, innit? I'm not a marine.So, I'm one of some other few and non-necessarily proud … but not ashamed! One of the few, the self-assured, the self-reliant!)
Seriously, how many games do you have? Moore's law is arguably most evident in storage media. And why would you not have a local copy of ALL your games purchases? Are you sacrificing your bandwidth for the good of other people's Netflix addictions?
If nothing else, take this as a hint to start downloading your games now. It may take a few days / weeks / months (depending on the number and even how recently they were made, since
e.g.,
Ultima IV is a whopping 26MB and
Morrowind is 1300MB, whilst
Fallout: New Vegas is over 3700MB, etc.).
Preparation would be a better response than panic, don't you think?